Ala
Alaysia Southward, 1991
- Alaysia spiralis Southward, 1991
Annelida → Polychaeta → Sabellida → Siboglinidae
Alb
, Albanidrilus , Alboglossiphonia
Alc
, Alciopa , Alciopidae , Alciopina , Alcyonosyllis
Ale
, Alentia , Alentiana
Ali
, Alikuhnia , Alitta
Alk
, Alkmaria
All
Allmaniella McIntosh, 1885
- Allmaniella arafurensis Horst, 1915
- Allmaniella setubalensis McIntosh, 1885
Annelida → Polychaeta → Phyllodocida → Aphroditiformia → Polynoidae → Lepidonotinae , Allolobophora , Allonais , Alluroides , Alluroididae
Alm
, Alma
Alp
, Alphadrilus
Alv
Alvinella Desbruyères & Laubier, 1980
- Alvinella caudata Desbruyères & Laubier, 1986
- Alvinella pompejana Desbruyères & Laubier, 1980
Annelida → Polychaeta → Terebellida → Terebellomorpha → Alvinellidae
Porodica Alvinellidae Desbruyères & Laubier, 1986
- Alvinella Desbruyères & Laubier, 1980
- Paralvinella Desbruyères & Laubier, 1982